So it is important to emphasize that nothing she encountered led her to question the science; she still has no doubt that the planet is warming, that human-generated greenhouse gases, including carbon dioxide, are in large part to blame, or that the plausible worst-case scenario could be catastrophic. <a href="http://www.scientificamerican.com/article.cfm?id=climate-heretic&page=3Regarding">http://www.scientificamerican.com/article.cfm?id=climate-heretic&page=3Regarding</a> Roger Pielke, S